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San Diego is the second-largest city in California after Los Angeles, home to more than 4.9 million residents throughout its metropolitan region.
The city, which is nicknamed "The Birthplace of California," is located at the United States' border with Mexico at the Baja Peninsula and is one of Southern California's top cultural and economic centers, known for its beautiful deep-water harbor, which offers ample opportunities for water sports, boating, and swimming along more than 70 miles of pristine beaches.
A year-round mild climate makes the city one of the American West Coast's top tourist destinations, home to famous San Diego attractions such as the acclaimed San Diego Zoo, the immense Balboa Park, the culturally-focused Gaslamp Quarter, and a number of museums chronicling the city's rich naval history.
Exploring the city is easy for tourists traveling alone, with ample sites for bike rental and major attraction access provided by the city's Hop-on Hop-off Trolley.
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